"Encyclopedia of elementary mathematics" is a fascinating and informative work created by outstanding domestic mathematicians - Alexandrov, Marukushevich and Hinchin .. This book is not just a textbook, but a whole world in which the reader immerses himself, discovering the amazing aspects of elementary mathematics. It will become a real treasure for both students and teachers, as well as for everyone who is interested in mathematics and wants to expand their knowledge in this area. The book covers a wide range of topics, ranging from the basics of arithmetic and algebra to more complex concepts such as geometry and number theory. The authors masterfully explain complex ideas in simple and accessible language, which makes the material understandable even for those who do not have deep knowledge in mathematics. Each section of the book is filled with examples, tasks and illustrations that help the reader to better assimilate the material and see the practical application of mathematical concepts in everyday life. "Encyclopedia of elementary mathematics" will be interesting not only for students and schoolchildren, but also for adults who want to refresh their knowledge or learn something new. It is suitable for those who are ready for intellectual challenges and seek to develop their analytical abilities. The book will be an excellent assistant for teachers who are looking for high-quality materials for preparing lessons, as well as for parents who want to help their children in their studies. The topics raised in the book cover not only theoretical aspects, but also the practical application of mathematics in various spheres of life. The authors emphasize the importance of mathematical thinking and its role in the development of logic and critical analysis. Readers will be able to learn how mathematics permeates all aspects of science and technology, as well as how it affects our everyday existence. This makes the Encyclopedia of Elementary Mathematics not just a textbook, but a real guide to the world of numbers and formulas. The style of the authors is clear and accurate . They are able to explain complex things in simple language, which makes the book available to a wide audience. Alexandrov, Marukushevich and Khinchin are names familiar to many, and their works have long won recognition in scientific circles. Each of their works is distinguished by the depth of analysis and the desire to convey to the reader the beauty and harmony of mathematics. If you are looking for books on mathematics that will help you master elementary concepts and deepen your knowledge, the Encyclopedia of Elementary Mathematics will be an excellent choice. It can be your faithful companion in the study of this fascinating science, as well as a source of inspiration for further research. Readers interested in such works as "Mathematics for All" or "Basics of Mathematical Analysis" will also find in this book a lot of useful and interesting Do not miss the opportunity to discover the world of elementary mathematics, which awaits you on the pages of this wonderful encyclopedia. Allow yourself to immerse yourself in the study of numbers and formulas, and you will see how mathematics can become not only a useful tool, but also a real art.